House LED lights and fans shut off when Refrigerator pump cycles off

This morning, my garbage disposal jammed (hit the switch, motor stalling sound, lights dim slightly). This was just after I started my dishwasher (so high draw from motors/heaters?). After maybe 2 seconds of stalled disposal, all the LED lights in the house stayed flickering, while the incandescent were dim. I immediately stopped the garbage disposal, but the flickering continued. I stopped the dishwasher, and the flickering stopped.

I then killed the kitchen breaker, and assessed the house: 2 PCs dead, microwave dead. I unplugged everything else digital or expensive.

I then turned on 1 of 2 kitchen breakers (no dishwasher breaker). Everything seems fine. Lights maybe slightly dim? Not sure if imagining. Wall socket tests at 115v. Turn on final breaker. No notable change. Turn on dishwasher, everything flickers etc again. Wall socket measures 65v! Stop dishwasher. Wall voltage returns to 105v.

Some minutes later, the Fridge compressor turns off (I assume temp reached?), and all the LEDs and digital fans in the house also switch off. Incandescent dim. Some minutes later, compressor kicks on, LEDs etc also return! Wut!? When compressor off, wall voltage 170v!

Fridge unplugged, wall has now returned to 105v. Turned dishwasher back on - everything flickers again. So appears both appliances are messed up.

Help.

What do I need to check in the house for damage after apparently having 170v in a 110v line?

Should I assume fridge and dishwasher are dead? They are ~15 years old. I suppose I can dig into them, but with the availability of parts, I suspect buying new is the only option with a reasonable timeframe.